Luminous electric heater.



F. KUHN.

LUMINOUS ELECTRIC HEATER.

APPLIoATIbN FILED MAYIB, 1911.

Patented May 19, 1914.

I provi UNITED STATES PATENT onn cn.

FRANK KUI-IN, 0F DETROIT, MICHIGAN, ASSIG-NOR TO AMERICAN ELECTRICALHEATER COMPANY, 015 DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

LUMINoUs ELECTRIC HEATER.

Specification of Letters Patent.

Patented May 19, 1914.

-State of Michigan, have invented certain new and useful Improvements inLumlnous Electric Heaters, of which the following is a specification,reference being had therein to the accompanying drawings.

The invention relates to luminous electric heaters of that type in whichthe luminous heating element is inclosed in the glass bulb and isdetachably engaged with a socket.

It is the object of the invention to obtain a construction which may beemployed as a substitute for a fire-place and is adapted where desired,to be set into the wall of a room.

It is a further object to provide means for varying the heating efl'ect,further tojprovide effective heating insulation for the cas ing and toguard the terminals from over heating, and further to provide variousfeatures of construction as hereinafter set forth.

In the drawingsFigure 1 is a perspective view of the heater detached;Fig. 2 is a Vertical central section of the heater as mounted in thewall; Fig. 3 is a diagram sh wing the arrangement of the electriccircuits.

A is a casing adapted to be mounted in the wall to form a niche in whichthe luminous heating elements are placed. This cas-- ing is preferablyof the form of an ordinary fireplace and is preferably provided with areflecting lining B.

C are sockets mounted in the lower part -of the casing A and preferablybelow the bottom D of the lining B, being in registration with aperturestherethrough.

E are the luminous heating elements having threaded terminal contacts Iat their lower ends for engaging the sockets C through the apertures inthe lining and pro jecting upward into the niche.

To protect the sockets C from, over heating they are arranged in achamber G having an open work front H which permits free access of airthereto. This chamber G also communicates at its ends and at the -rear.with an air space N between thelining B and the outer wall of the case,while at the upperv end of the case apertures I are ed for the escape ofthe heated air.

There is also preferably arranged a layer ofheat insulating material Jbetween he llnlng B and the air space. Thus when in operation cool airis constantly entering the chamber G and passing about the sockets Ginto the wall air space, and the heated air rlsmg in the spacebetweenthe lining and outer wall will be discharged through theapertures I.

It is desirable to provide means for regulating the amount of heatgenerated and for this purpose a plurality of heating units .arepreferably arranged within the niche and a controlling switch isprovided. To malntain a symmetrical appearance when less than the fullnumber of units are in servlce, I have preferably arranged the latterwith a central unit and the other units symmetricallyarranged uponopposite sides thereof. The electric circuits are also arranged tobecontrolled by thelswitch K so that when only one unit is in circuitthe central member is used, where two units are in service the centralunit is cut-out and the two symmetrically arranged on opposite sidesthereof are thrown into circuit, and in the same manner. a symmetricalappearance is maintained with each added unit until all are in service.The controlling switch K is preferably mounted centrally in front of thechamber G.

What I claim as myinvention is:

- An electric heater, comprising a casing having an open niche therein,a reflecting air chamber having a discharge opening adjacent the topthereof and a layer of heat insulating material interposed between {helining and the casing at the back of the at-ter.

In testimony whereof I affix my signa- I ture in presence of twowitnesses. i

v FRANK KUIIN.

Witnesses:

JAMES P. BARRY, ADELAIDE I. ADAMS.

